import { login, logout, getInfo } from '@/api/user'
import { getToken, setToken, removeToken } from '@/utils/auth'
import router, { resetRouter } from '@/router'
import ro from 'element-ui/src/locale/lang/ro'

const getDefaultState = () => {
  return {
    token: getToken(),
    name: '',
    avatar: '',
    // introduction: '',
    roles: []
  }
}

const state = getDefaultState()

const mutations = {
  RESET_STATE: (state) => {
    Object.assign(state, getDefaultState())
  },
  SET_TOKEN: (state, token) => {
    state.token = token
  },
  SET_NAME: (state, name) => {
    state.name = name
  },
  SET_AVATAR: (state, avatar) => {
    state.avatar = avatar
  },
  SET_ROLES: (state, roles) => {
    state.roles = roles
  },
}

const actions = {
  // user login
  login({ commit }, userInfo) {
    const { username, password } = userInfo
    return new Promise((resolve, reject) => {
      login({ username: username.trim(), password: password }).then(response => {
        const { data } = response
        // 登录验证通过之后将对应的TOKEN存放到cookie中
        commit('SET_TOKEN', data.token)
        setToken(data.token)
        resolve() // Promise异步操作成功之后调用resolve
      }).catch(error => {
        reject(error)
      })
    })
  },

  // get user info
  getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      getInfo(state.token).then(response => {
        const { data } = response

        if (!data) {
          reject('Verification failed, please Login again.')
        }

        const { roles, name, avatar , buttons } = data
        // roles 必须为非空
        if (!roles || roles.length <= 0) {
          reject('getInfo: roles must be a non-null array!')
        }
        commit('SET_NAME', name)
        commit('SET_AVATAR', avatar)
        commit('SET_ROLES', roles)
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },

  // user logout
  logout({ commit, state }) {
    return new Promise((resolve, reject) => {
      logout(state.token).then(() => {
        removeToken() // must remove  token  first
        resetRouter()
        commit('RESET_STATE')
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

  // remove token
  resetToken({ commit }) {
    return new Promise(resolve => {
      removeToken() // must remove  token  first
      commit('RESET_STATE')
      commit('SET_ROLES', [])
      resolve()
    })
  },

  // 动态改变权限
  async changeRoles({ commit, dispatch }, role) {
    if (role === 'Admin') {
      await this.resetToken()
      this.$router.push(`/login?redirect=${this.$route.fullPath}`)
      location.reload()
    } else {
      const token = role + '-token'

      commit('SET_TOKEN', token)
      setToken(token)

      const { roles } = await dispatch('getInfo')

      resetRouter()

      // 基于角色生成可访问的路由
      const accessRoutes = await dispatch('permission/generateRoutes', roles, { root: true })
      // 动态添加可访问的路由
      router.addRoutes(accessRoutes)
    }
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}

